#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>

void fun()
{
    printf("fun begin!\n");
    _exit(20);
    printf("fun end!\n");
}
int main()
{
    fun();
    printf("main!\n");

    //exit(16);

    //int a = 10;

    //a /= 0;

    //return 66;


    //int i = 0;
    //for(;i<100;i++)
    //{
    //    printf("%d->%s\n",i,strerror(i));
    //}



    //FILE *fp = fopen("log.txt","r");
    //if(fp == NULL) return 13;

    ////读取
    //fclose(fp);
    return 0;
}
